Cow-milking machine.



F. E. NEWELL.

00W MILKING MAUHINB.

APPLICATION FILED M2127, 1907. LUSQQ 1G Patenmd Jun a 18, 1912.

3 SHEETS'SHEET 1.

gnveni'oz l 1/ b1 eases fitto mung P. B. NEWELL.

UOW MILKING MACHINE.

APPLICATION FILED MAY 27, 1907v lfi fifil a Patented June 18,1912,

3 SHEETS-SHEET 2.

P. E. NEWELL.

00W MILKING MAGHINE. APPLICATION FILED HAY 27, 1907.

LQSQQEU, Patented June 18,1912.

' a SHEETS-SHEET s.

, & /WEZ 4 UNITED STATES PATENT enrich.

.FRED ELTON NEWELL, OF WESTMINSTER, VERMONT, ASSIGNOR T VERMONT FARM.

MACHINE COMPANY, OF BELLOVIS FALLS, VERMONT, A CBBEDfifi'IION OF VER- monr.

cow-MILKxNc MACHINE.

' Specification of Letters Iatent. Patented June 18, 1913 Application filed May 27., 1907. Serial No. 376,015.

tain new and useful Improvement in Cow- Milking Machines, of which the following is' a. full, clear, and exact description.

. This invention relates to that class of cow milking machines ii -which vacuum suction and air at atmospheric {pressure are commilking The pulsator has two milk chan-'.'

bined and controlled in such way as to simulate the ordinary mimual action in 3 drawing the milk.

" In the present invention. the milk tacle is utilized as such and also as a vacuum chamber, and each milk receptacle of any "number of a series of receptacles 'ponnect cd w th a'common vacuum source. has upon its cheer a pulsator which is operated to control the vacuum and air pressure 111 such way as to produce the simulation oi manual nels connected with appliances for milking two cows, and these two channels open into a single port communicating with the interior 'of the milk receptacle, and the pulsator' is arranged to operate simultaneously to open and close communicatiomthrough this port, with the two aforesaid channels.

'In the preferred construction, the pulsator is operated electrically, through the intervention of a solenoid, or other suit-able electro-magnet-ic agent, automatically controlled, The piston of the pulsator carries "the armature and may be extended as the noid. In

movable core of the electro-magnet or solethe accompanying drawings, illustratingthe invention, in'tihe several figures of which like pa'rts are similarly-designated,

.Figiire 1 is an elevation of a milk receptacl e,=-th'e pulsator, the s0lenoid, and a pair of sets of teat'cups. Fig. 2 is a top plan view of the cover. 'stantially in the .planeof line AB, Fig. 2.

Fig. 3 is a section taken sub- Fig. 4 is a longitudinal section of the pulsator and solenoid, showing the parts in posit-ionwith themilk receptacle port open to theatmosphere. Fig. 5 is a similar longi tudinal section, but showing the parts ininitial milking position and with the atmos pherie communication closed. Fig. 6 isan' elevation and partial vertical section or an electrical interrupter or make-and-breakdevice, for use in the electrical installation for operating the pulsators; Fig, 7 is aplan view and partialsection of said interrupter. Fig. 8 is an end elevation of the contacts, their holding plate and the auxiliary cam of the interrupter. 'Fig..9 is a side elevation of the auxiliary cam of the interrupter. Fig. 10 is a diagrammatic view representing the electric installation as applied to three pulsators, the auxiliary cam being omitted.

1 is the milk receptacle, having the rim 2, and the cover- 3, said cover, as shown in 3, having a flange 4. Between the rim 2 and cover 3 is interposed a gasket or packing-ring 5 of any suitable material capable of making an air-tight joint between the cover and the rim of the receptacle. 'The cover is provided with a nipple 6 for con nection with a suction apparatus for creating a vacuum in the receptacle. Fixedly mounted on the cover is a casting 7, ha

iug branches 8 and 9, each of which adapted to receive a tube 10 extending from the teat-cups 11, which may be of ordinary construction. These branches are provided. with channels 12, in which are interposed the cut-off cocks or plug valves '13, and these 'two channels 12 converge and open in a common port 14, made in the cylindrical port on 15. of the casting 7. Each of the branches 8 and 9 is provided with an observation glass 16 placed between the packingrings 17 and 18 and held in place by an annular screw-cap 19 in such way that the interior of themilk channels 12 may be visible atall times, in order to inspect the progress of the milking. The cylindrical portion isghored out to receive a bushing or lining 20', and the port 14- extends through this bushing. Another port 21 is' made in the cylinder and opens to the atmosphere through a filtenchamber 22 and a perforated cap 23. One end of the bushing is screw threaded and provided with a re- I movable cap 24-.

a source of electrical supply which may be a battery or any other suitable electric gen erator. 71 and 72 are the wires from the generator. 73, 74 and'75 are the wires to the respective solenoids C, I) and E. 76 is the leading-inwire, and 77 is the return wire to the resistance oi-kick coil 7 8; These several wires are connected up in circuit with the interrupter or make-and-break device F, substantially as shown.

Notshown, but of any approved construction, in the installation, is a vacuum tank with the necessary apparatus to maintain a;

belt from any suitable power connection and,

the worm on its shaft engaging the wormwheel 30. rotates the cam shaft lil and the cam 54 thereon, and this cam coming into contact with one of tbcpins 57, moves said )in outwardly against the stress of its spring nd brings the contact-pieces 58 and into electrical contact. The contact-pieces 5 8 are practically constant vacuum, and leadingl in electrical contact with the incoming cur-- from this tank is a main vacuum pipe having branches extending to each station where the cows are to be milked. and each branch endingin a valve having a nipple or other hose. connection at 6, with each independent va'cu'um milk receptacle. If only one cow is'to be milked at each milk receptacle, then the other teat cup connections are closed by turning the cock 13 therein.- The electrical apparatus bein in action, the pulsator will be operated thereby, and a partial vacuum Will be produced in each of the milk receptacles, and the piston of the pulsator will assume thepositio'n shown in Fig. 5, in which there is a free communication with the milk receptacle through the passages 28 and 14 into the vacuum and milk passages or channels 12, and thence to the teat cups. The suction caused by the vacuum will act upon the teat cups to draw the milk, and this milk-drawing action is maintained for a short period, and then by means of the interrupter orII'nake-and-break device; the circuit is closed and the solenoid is energized and the armature 31 attracted and the piston 2:) moved over to the position shown in Fig. 4, which cuts oil" the communication previously described. It is to be noticed that when the, piston has thus cut 0d the communication, the vacuum continues in all of the branches between the teat cups and the port ltuntil the air port 21 has been opened sufficiently to admit atmospheric air, and upon this admission of'atmospheric air, the vacuum is redi'iced and the teat cups relax their hold or drawing action on the teats and the milk stops flowing: whereupon a short period of rest ensues. not. suiiicient, however, to entirely destroy the vacuum before the interrupter again acts and breaks the circuit and thus decncrgizes the solenoids. When thus decncrgized, the springs -10, which are compressed by the attraction of the armature, are free to expand, and thereby ,force the piston backto its initial position, shown in Fig. 5, at which time the vacuum action again becomes fully active. These periods of suction and rest alternate at regular predetermined intervals with great accuracy "entdistributing ring connected with the eeding wire 72, and the contact-pieces 59. are connected with the out-going circuit wires leading to the pulsators and the return wire. .The contact-pieces or brushes are connected up by wires 79, 8O and;8l with the wire 76, leadingto the resistance or kick-coil 78.- Referring to the diagram, Fig. 10, which shows the contact-pieces 58 and 59-at the left. in electrical contact, the circuit would be from the generator through 'the'wire .72;

and the interrupter to the solenoid C. \Vhen the stroke of the cam 54 is nearly completed, the auxiliary cam-tip 67 has made contact between the overlying finger of the contact-piece 59. and the unloading brush 70, thereby making a. circuit from said contact-piece 59 around through the brush 70 and the wire 76 through the resistance of kiclecoil 78. 'The path of this circuit is closed just before the action takes effect which opens the circuit between the contact-pieces 58 and 59, thereby preventing sparking between the contacts 58 and 59. These series of actions occur as each of the spring pins 57 is acted upon by the.

cam 54 in its revolution. The interrupter thus subserves the two-fold purpose of interrupting the current leading to the several solenoids, so that any desired number of pulsations of the pulsator may be obtained within a given time, both with respect to duration of partial vacuum and period of rest or air admission, and employing a relatively small electric generator, because of the diiterent circuits making aconstant load thereon.

Inthe installation of the apparatus, the wires for the circuits of they several milk receptacles and their pulsators may beincased in a cable or other suitableconduit, and the milking receptacles and their pulsatos connected by suitable branch wires leading from the main circuit wires; and it is obvious that any number of milkreceptacles with their respective pulsators, say

one, two or three, may be included in a single branch circuit, preferably in parallel. That is to say, the circuits may be so arcall operated p'ulsators mil and air passages, an electric generator,-

ranged that if twelve machines were used in a single installation, with a three point interrupter, as herein shown, four ot the machines would be included in a single branch circuit andjwould be drawing on the generator at one time, and by this ar-- rangement, it is possible to use a generator of very small dimensions, and consequently the power for operating the pulsators is correspondingly less.

What I claim is 1. In a milking machine, a vacuum milk receptacle, a cover therefor, a pulsator fixed on said cover and having vacuum, milk and air passages, and a sliding piston extending outwardly 'and constituting the movable '[COIG of an electro-niagnet and having a disk H thereon forming an armature for said electro-magnet, in combination with said electro-magnet.

2, In a milking machine, a vacuum milk receptacle, acover therefor, a pulsator fixed on saidzcover and having vacunm,'milk and air passages, and a sliding piston extending outwardly and constituting the movable core of'an electro-magnet and having 'a disk thereon forming an armature for said electro-magnet, said disk squared oil at its hottom to prevent the piston from tuming,;- in combination with an electro-magnet.

3. In a milking apparatus, a vacuum m'ilk receptacle, an air and milkptxssage for said receptacle, an electrdmagnet'ically operated pulsa'tor for controllingsaid air and mil electric onnections between said 'electr generator' and said pulsator, a circuit inter Y rupter included insaid connections for niak ing and reakmg the. fillCulli to said pulsa- 40 tor, and a resistance coil interposed between said circuit interrupter and the generator for unloading the current from the- 3!\l;8 i-- rupter cont-acts when the circuit is brokers? 4. In a milking apparatus, a series of vacuum milk receptacles, milk and air passages for said receptacles, electromagneti- 'cally operated pulsators for controlling said.

milk and air passages, on electric genera-' passage, an electric generator,

with

terrupter and the generator for unloading the currentfroin the'intermpter contacts when. the circuits are broken, 6. In a milking machine, the combmatio I tit-h a vacuum mill: receptacle, apuleator for said receptacle having vacuum, and

and air passages, and a piston for control; llng said passages, of a solenoid for operat" ing said piston, comprising a sleeve, a Wind ingfor said sleeve, and a" magnetic casing for said winding extending over the ends} thereof. V

7. In a milking machine, a vacuum i-inilk receptacle, a cover therefor, a. pulsator iii-led on said cover and having air passages, and a sliding piston extei ing outwardly and constituting the movable core of. a solenoid and having a; disk there on forming an armature for said solenoid, in combination with said solenoid,

8. In a milking machinefo ulsatorwhose piston is rolongedto form t e movable core of a so enoid, in combination with suchsolenoid and a retracting spring within the chamber of such solenoid.

, 9. In a milking-machine, a vacuum milk vacunrm'millr receptacle, a pulsator tor said receptacle comprising-acylinder l'iaving' vacuum, milk and air passages, a iis ton arranged in said I cylinder for control 'ing said vacuum, milk and air passages and extending through one end of said cylinder, and a screw-cap for closing theother end of said. cylinder.

10. In a nnllnng machine, the comoination with a vacuum milk receptacle, 'a

milk and'air passages and a piston torrentrolling said passages, of a solenoid for op erating said piston,comprising av sleeve, a

Winding for said sleeve, and a magnetic casing for said winding. i

11, In a milking machine, a vacuum milk receptacle, a pulsator for said receptacle having vacuum, millarand air passages, and

a piston for controlling said passages hav .ing an extension forming the movable core of a solenoid, combined with a solenoid sleeve, a winding for said sleeve, and lamagnetic casing for said winding extend- 7 ing over the ends thereof.

12. In a milking machine, the combineulsator for said receptacle having vac-cum, i

tion with a vacuum milk receptacle, a

pulsator said passages, of said piston, comprising; a sleeve, awinding therefor having vacuum, milk and air passages, and a p ston for controlling" a solenoid for operating 3 for said sleeve, and a magnetic 'casin for said winding extending over the ends t ere-i,

of andrprovided with a fixed core extending within said sleeve at. one end, and a jection on said piston adapted to enter, the

other end at said sleeve and constituting a i,

movable core for said solenoid.

13. In a milking machine, the combine tion with a vacuum milk receptacle, :1 other end of said sleeve and constituting a pulsa'tor therefor having vacuum, milk and movable'eore for said solenoid, and a flange ail; passages, and. a piston for controlling on said piston constituting an armature for said passages, of a solenoid for operating the solenoid.

5 said piston, comprising a sleeve, a winding In .testimony whereof I have hereunto set 15 for said sleeve, and a magnetic casing for my-hand this..-23d day ofMay A. D. 1907. said winding extending'qver the endstheren .:*';FRED ELTON NEWELL. oil and provided with a fixed eo'reextend- Witnes'sesr ing within said sleeve at one end, 'a projec- R10. BIDWELL,"

10 tion on said piston adapted -.to ;enter the F. G. HTLDRETH. 

